Pictures can be found in the media section.
Nintendo of America's E3 site has also added the first details on the title:
The Mushroom Kingdom just got a whole lot more hectic as Mario & Co. double up for furious kart racing!
The latest in the acclaimed Mario Kart series is here, and this time, you won't be racing alone! Each kart holds two racers, so choose from Mario, Luigi, Peach, Baby Mario, Baby Luigi, Yoshi, Birdo, Wario, Waluigi, Donkey Kong, Diddy Kong, Bowser, Bowser Jr., Koopa, and Paratroopa and pair them up any way you see fit. The character in front handles the driving duties, while the character in the rear doles out damage with six normal items and eight special items that only specific characters can use. Racers can swap places at any time, so switch it up on the fly to make the best use of your items as you tear around curves and over huge elevation changes.
Mario Kart: Double Dash is due for release by the end of the year.

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